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November 25, 2020 15:21
Génération de fichiers avec une ligne par établissement géographique, coordonnées en WGS84 longitude latitude (EPSG:4326) et encodage en UTF-8
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| library(data.table) | |
| library(sf) | |
| library(tidyr) | |
| library(leaflet) | |
| library(dplyr) | |
| # télécharger le fichier FINESS géocodé le plus récent et le renommer finess_geocoded_latest.csv | |
| fi1 = fread("finess_geocoded_latest.csv",encoding="Latin-1",colClasses = "character") | |
| n = nrow(fi1) | |
| fi2 = fread("finess_geocoded_latest.csv",encoding="Latin-1",colClasses = "character",skip = n+1,sep=";") | |
| nm1 = c( | |
| 'section', | |
| 'nofinesset', | |
| 'nofinessej', | |
| 'rs', | |
| 'rslongue', | |
| 'complrs', | |
| 'compldistrib', | |
| 'numvoie', | |
| 'typvoie', | |
| 'voie', | |
| 'compvoie', | |
| 'lieuditbp', | |
| 'commune', | |
| 'departement', | |
| 'libdepartement', | |
| 'ligneacheminement', | |
| 'telephone', | |
| 'telecopie', | |
| 'categetab', | |
| 'libcategetab', | |
| 'categagretab', | |
| 'libcategagretab', | |
| 'siret', | |
| 'codeape', | |
| 'codemft', | |
| 'libmft', | |
| 'codesph', | |
| 'libsph', | |
| 'dateouv', | |
| 'dateautor', | |
| 'maj', | |
| 'numuai' | |
| ) | |
| nm2 = c( | |
| 'type', | |
| 'nofinesset', | |
| 'coordxet', | |
| 'coordyet', | |
| 'sourcecoordet', | |
| 'datemaj' | |
| ) | |
| names(fi1) <- nm1 | |
| names(fi2) <- nm2 | |
| fi2 <- fi2 %>% | |
| separate(sourcecoordet,c("s1","s2","s3","s4","s5","s6","CRS"),sep=",")%>% | |
| select(nofinesset,coordxet,coordyet,CRS)%>% | |
| data.table | |
| table(fi2$CRS) | |
| finess_geoloc = merge(fi1,fi2,by="nofinesset") | |
| finess_geoloc[,coordxet:=as.numeric(coordxet)] | |
| finess_geoloc[,coordyet:=as.numeric(coordyet)] | |
| finess_geoloc = finess_geoloc[!is.na(coordxet)&!is.na(coordyet)] | |
| # https://geodesie.ign.fr/contenu/fichiers/documentation/pedagogiques/TransformationsCoordonneesGeodesiques.pdf | |
| code_crs = data.table(CRS = c("LAMBERT_93","UTM_N20","UTM_N21","UTM_N22","UTM_S38","UTM_S40"), | |
| EPSG = c(2154,4559,4467,2972,4471,2975)) | |
| i=6 | |
| finess_geoloc_lonlat = lapply(1:nrow(code_crs),function(i){ | |
| one_crs = code_crs$CRS[i] | |
| epsg = code_crs$EPSG[i] | |
| sub = finess_geoloc[CRS==one_crs]%>% | |
| st_as_sf(coords=c("coordxet","coordyet"),crs=epsg)%>% | |
| st_transform(4326) | |
| # #Pour une vérification visuelle. Si tous les points sont sur la terre ferme et sur les bonnes îles, c'est bon signe. | |
| # leaflet(data=sub)%>%addTiles()%>%addMarkers(label = ~rs) | |
| sub | |
| }) | |
| finess_geoloc_lonlat = do.call("rbind",finess_geoloc_lonlat) | |
| # Vérification sur qqpoints | |
| leaflet(data=finess_geoloc_lonlat[sample(nrow(finess_geoloc_lonlat),1000),])%>% | |
| addTiles()%>%addMarkers(label = ~rs) | |
| # Tous les points ont bien des géocoordonnées, c'est important de toujours le vérifier sinon on induit un décalage sans erreur sur la carte !!! | |
| nrow(finess_geoloc_lonlat) | |
| finess_geoloc_lonlat = finess_geoloc_lonlat[!sf::st_is_empty(finess_geoloc_lonlat),] | |
| nrow(finess_geoloc_lonlat) | |
| # to UTF-8 | |
| finess_geoloc_lonlat = finess_geoloc_lonlat%>% | |
| mutate_if(is.character,iconv,to="UTF-8")%>% | |
| mutate(CRS="WGS84") | |
| save(finess_geoloc_lonlat,file = "clean_finess_geoloc.RData") | |
| fwrite(finess_geoloc_lonlat,"clean_finess_geoloc.csv") | |
| # finess_geoloc_lonlat = fread("clean_finess_geoloc.csv",encoding = "UTF-8") |
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